JVC KY-F75 manual About ALC and EEI operations, E45

Models: KY-F75

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About ALC and EEI operations

ALC stands for Automatic Level Control and EEI for Extended Electronic Iris. ( page E28) By making the respective settings, the Automatic Level Control (ALC) will operate under dark lighting, and the electronic shutter (EEI) will operate under bright lighting. Furthermore, setting the IRIS mode to AUTO will synchronize sensitivity, iris and electronic shutter so that an appro- priate signal level can be acquired automatically at all times.

The ALC mode increases sensitivity from 0dB to +12dB under dark lighting and the EEI modeautomatically adjusts the range of 1/7.5 s to 1/2384.7 s (calculated value) under bright lighting. In other words, the signal level is adjusted in the range of 2 graduations of the aperture under dark lighting and 8 graduations under bright lighting. When the IRIS mode is set to manual, the sensitivity and electronic shutter change continuously while the iris setting stays fixed. (  page E27 Iris mode)

This feature holds the advantage of being able to shoot under changing light conditions without the depth of field altering.

MEMO

When EEI is used, the amount of change in one step of the signal level will be large and the precision becomes bad as the shutter speed is faster.

Operational range (when ALC MAX: +12dB)

Light: lx

 

4

8

16

 

31

 

63

 

125

250

500

1000

2000

4000

8000

16000

32000

64000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

640000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+12dB

+6dB

0dB

 

 

 

1/7.5

 

 

 

 

 

 

 

 

 

 

EEI LIMIT

: When 1/7.5s

+12dB +6dB 0dB

ALC

 

Auto Iris

 

 

 

 

 

EEI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/15 1/30 1/60 1/120

1/2384.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F2.8

F4

F5.6

F8

F11

F16

 

 

ALC

EEI

1/1.871s 1/3.75s

EEI LIMIT : When 1s

E45

Page 49
Image 49
JVC KY-F75 manual About ALC and EEI operations, E45

KY-F75 specifications

The JVC KY-F75 is a professional-grade digital camera renowned for its exceptional image quality and versatile performance, making it a popular choice among video production professionals. This camera is equipped with a high-resolution 3CCD imaging system that captures images with remarkable clarity and color fidelity. Each of the three charge-coupled devices is dedicated to a primary color—red, green, and blue—which allows for a wider color gamut and more vibrant images.

One of the standout features of the JVC KY-F75 is its ability to deliver a maximum resolution of 720x480 pixels, providing high-quality output suitable for a range of broadcast applications. Its sensitivity range extends down to as low as 0.5 lux, making it capable of capturing clear images in low-light environments. The integrated digital signal processing ensures that image noise is minimized, enhancing overall picture quality.

The camera also provides excellent connectivity options, including component video output, composite video output, and balanced audio inputs, which facilitate seamless integration into existing production setups. This is particularly beneficial for live-event broadcasting and professional video production where multiple devices need to be synchronized.

In terms of ergonomics, the JVC KY-F75 is designed for ease of use. It features a compact and lightweight design, making it manageable for handheld use or for mounting on a tripod. The user-friendly interface allows for quick adjustments on the fly, ensuring that operators can adapt to changing conditions without missing a moment.

Moreover, the camera supports multiple frame rates, which grants operators the flexibility to capture slow-motion sequences or fast-moving subjects with ease. Features like automatic and manual white balance settings enhance its adaptability to different shooting environments, providing consistent color reproduction regardless of lighting changes.

The JVC KY-F75 is not just a camera; it is a comprehensive solution for professionals seeking quality, reliability, and versatility in their video production endeavors. With its combination of advanced imaging technology and user-centric features, it stands out as an excellent choice for anyone serious about achieving high-quality video output.